Governor for steam-engines



s. H. MILLER.

GOVERNOR.

No. 29,986. PatentedSept. 11, 1860.

. UNITED STATES PATENT OFFICE.

S. H. MILLER, OF HANOVERTON, OHIO.

GOVERNOR FOR STEAM-ENGINES.

Specification forming part of Letters Patent No. 29,986, dated September11, 1860; Reissued March T 0 all whom it may concern:

Be it known that I, S. H. MILLER, of Hanoverton, in the county ofColumbiana and State of Ohio, have invented a new and useful Improvementin Marine Governors; and I do hereby declare that the following is afull, clear, and exact description of the same, reference being had tothe accompanying drawings, forming a part of this specification, inwhich Figure 1, represents a vertical central section and Fig. 2, a sideview of the apparatus.

Similar letters of reference, in each of the several figures indicatecorresponding parts.

The nature of my invention consists, 1st, in the balancing bar andsprings, in combination with a governor as hereinafter to be described.

It consists, 2nd, in the arrangement of a sliding top collar, linkedarms and rods and governor balls, in combination with a balancing barand springs, in the manner and for the purposes to be described.

The object of my invent-ion is to construct a governor for marinepurposes, the balls of which will not fly out irregularly so as tovitiate their proper action on the machine in consequence of the rollingand pitching motion of a ship at sea.

To enable others, skilled make and use my invention, I will proceed todescribe its construction and operation.

The governor consists of a vertical shaft A, upon which are arranged abottom collar G, and a top collar B. Both the collars are free torevolve upon the shaft, and the top collar has an additional slidingmotion in a vertical direction.

Arms C, C, are pivoted to the top collar and arms D, D, are pivoted tothe bottom collar. Each of the arms C, is joined to its arm D, by pivotL, and a rod E, with a governor ball F, at its lower end, is hung toeach of the two pivots L.

Connecting rods H, H, extend one from each of the balls F, F, toward thecenter shaft, their inner ends being held by the ends of springs J, J.These springs are made in spiral shape at their upper ends and are theresecured to the opposite ends of a bar I, which at its center is pivotedto the upper part of the bottom collar G. It will be seen that wheneverone of these in the art, to-

springs should possess a greater tension or, on account of the shipsmotion be pressed upon harder than the other spring by the momentum ofits ball, the bar I, will there by be caused to move on its pivots so asto deviate from its position at right angles to the line of the centershaft. This change of position of bar I, will unwind a small portion ofone of the spirals while it will Wind up a corresponding portion of theother spiral so as to equalize the tension and pressure of both springs.

To increase the sensit-iveness of the balancing apparatus, it isnecessary that the ends of the springs should act directly upon theballs instead of any other intermediate part between the balls and thegovernor links. The balls are therefore connected to the ends of thesprings by the rods H, H, the top collar is made to slide instead of thebottom collar in order to arrange the parts and obtain results ashereinafter described.

e, 0,:7, Z), also 0, 25,:23, Z), and distance ec,:d, (Z,- take the point72, on the arm so that 6, 71,26, Z), then it is obvious that the points8, 7', Z), and 71, will always be in the same straight line, whateverposition the sliding collar is in. Then suppose that c, h,:ten inches,0, t,:5 inches and t, Z):5 inches and suppose that the center of gravityof c, h, and one half of the sliding collar be at is, six inches fromthe point it, and the weight of the same to be 18, and suppose thecenter of gravity of Z), t, be at m, 2 inches from Z), and its weightequal S. Then if the sliding collar be permitted to descend one inch,the point is, will fall inch, that is; a weight of 13 descends inch,which is the same as a weight descending 1 inch. Under the'samecircumstances, the center of gravity m, of the arm t, Z), whose weightis 8, will descend inch, which is equivalent to a weight of descending 1inch. Adding the two effects, we have the mechanical force generated bythe parts above the line 8, it, represented by a weight of moving 1inch; now this force must be expended in moving a weight of 1 inch inthe opposite direction, or its equivalent. For this purpose, the arm g,0, extends below the line .9, h.

Suppose we wish the common center of gravity of the part of the armbelow the line s, h, and the ball to be at 9, two inches from the pointh, then when the collar descends one inch, the point y, will rise inch;then the weight of that part of the arm and the ball 1nust: For a weightof 3 moving inch, is equivalent 'to %f, moving one inch. In this mannerby making the relative proportions of the apparatus as above described,the balls, links and collar B, Will be perfectly balanced whatever theposition of the ship and center shaft- A, may be.

The governor constructed as above described will always be exactlybalanced and will work with equal regularity no matter how violent themotion of the ship may be.

What I claim as my invention and desire to secure by Letters Patent, is

1. The balancing bar I, and springs J, J, in combination with agovernor, substantially as and for the purposes set forth.

2. The arrangement of a sliding top collar B, linked arms G, D, and rodsE, and governor balls F, in combination with a balancing bar I, andsprings J, substantially as and for the purposes set forth.

S. H. MILLER.

W'itnesses:

R. W. FENWICK, Goonwnv Y. Ar LEE.

